Check the listing for details. RAP-B-366U RAM Ball Adapter with 1/4"-20 Threaded Stud f.... Color: Black, Condition: New. Listed at 22.94 USD. RAM Ball Adapter with 1/4"-20 Threaded Stud f... RAP-B-366U Genuine RAM Products! The RAP-B-366U universal camera and camcorder base consists of a B size 1 INCHES rubber ball, connected to a round plate with a 1/4 INCHES -20 camera thread. The round plate provides extra support and stability for the camera it's attached to. The male 1/4 INCHES -20 threaded steel stud will connect to any standard female thread found on digital cameras, camcorders, and other devices.thread pitch 1/4 INCHES -20 x .25 INCHES plate size 1.23 INCHES Diameterball size B Size (1 INCHES )weight capacity Standard Use: 2 lbsHeavy-Duty Use: 1 lbmaterials High strength compositepackaging type Poly BagWeight 0.06 lb thread pitch 1/4 INCHES -20 x .25 INCHES plate size 1.23 INCHES Diameter ball size B Size (1 INCHES ) weight capacity Standard Use: 2 lbsHeavy-Duty Use: 1 lb materials High strength composite packaging type Poly Bag Weight 0.06 lb